/Engine/Source/Editor/SequencerCore/Public/MVVM/Views/STrackAreaView.h
Add a new track slot to this area for the given node. The slot will be automatically cleaned up when all external references to the supplied slot are removed.
void AddTrackSlot ( const [TViewModelPtr](API\Editor\SequencerCore\TViewModelPtr)< [IOutlinerExtension](API\Editor\SequencerCore\MVVM\Extensions\IOutlinerExtension) > & InDataModel, const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [STrackLane](API\Editor\SequencerCore\MVVM\Views\STrackLane) > & InSlot )